<template>
  <section class="loginContainer">
    <div class="loginInner">
      <div class="login_header">
          <h2 class="login_logo">硅谷外卖</h2>
          <div class="login_header_title">
            <a href="javascript:;" :class="{on: loginWay}" @click="loginWay=true">短信登录</a>
            <a href="javascript:;" :class="{on: !loginWay}" @click="loginWay=false">密码登录</a>
          </div>
      </div>
      <div class="login_content">
          <form @submit.prevent="login">
            <div :class="{on: loginWay}">
              <section class="login_message">
                <input type="tel" maxlength="11" placeholder="手机号" v-model="phone">
                <button :disabled="!rightPhone" class="get_verification"
                        :class="{right_phone: rightPhone}" @click.prevent="getCode">
                        {{computeTime>0 ? `已发送(${computeTime}s)` : '获取验证码'}}
                </button>
              </section>
              <section class="login_verification">
                <input type="tel" maxlength="8" placeholder="验证码" v-model="code">
              </section>
              <section class="login_hint">
                温馨提示：未注册硅谷外卖帐号的手机号，登录时将自动注册，且代表已同意
                <a href="javascript:;">《用户服务协议》</a>
              </section>
            </div>
            <div :class="{on: !loginWay}">
              <section>
                <section class="login_message">
                  <input type="tel" maxlength="11" placeholder="手机/邮箱/用户名" v-model="name">
                </section>
                <section class="login_verification">
                  <input type="text" maxlength="8" placeholder="密码" v-if="showPwd" v-model="pwd">
                  <input type="password" maxlength="8" placeholder="密码" v-else v-model="pwd">
                  <div class="switch_button" @click="showPwd=!showPwd" :class="showPwd?'on':'off'">
                    <div class="switch_circle" :class="{right: showPwd}"></div>
                    <span class="switch_text">{{showPwd ? 'abc' : '...'}}</span>
                  </div>
                </section>
                <section class="login_message">
                  <input type="text" maxlength="11" placeholder="验证码" v-model="captcha">
                  <img class="get_verification" src="http://localhost:4000/captcha" alt="captcha"
                   @click="getCaptcha" ref="captcha">
                </section>
              </section>
            </div>
            <button class="login_submit">登录</button>
          </form>
          <a href="javascript:;" class="about_us">关于我们</a>
      </div>
      <a href="javascript:" class="go_back" @click="$router.back()">
        <i class="iconfont icon-jiantou2"></i>
      </a>
    </div>
    <alert-tip :alertText="alertText" v-show="alertShow" @closeTip="closeTip"></alert-tip>
  </section>
</template>
<script>
import AlertTip from '../../components/AlertTip/AlertTip.vue'
import { reqSendCode, reqSmsLogin, reqPwdLogin } from '../../api'
export default {
  data () {
    return {
      loginWay: true, // true代表短信登录 false代表密码登录
      computeTime: 0, // 计时
      showPwd: false, // 是否显示密码
      phone: '', // 手机号
      code: '', // 短信验证码
      name: '', // 用户名
      pwd: '', // 密码
      captcha: '', // 图形验证码
      alertText: '', // 提示文本
      alertShow: false
    }
  },
  computed: {
    rightPhone () {
      return /^1\d{10}$/.test(this.phone)
    }
  },
  methods: {
    async getCode () {
      // 如果当前没有计时
      if (this.computeTime === 0) {
        // 启动倒计时
        this.computeTime = 30
        this.intervalId = setInterval(() => {
          this.computeTime--
          if (this.computeTime <= 0) {
            // 停止计时
            clearInterval(this.intervalId)
          }
        }, 1000)
        // 发送ajax请求
        const result = await reqSendCode(this.phone)
        if (result.code === 1) {
          // 显示提示
          this.showAlert(result.msg)
          // 停止倒计时
          if (this.computeTime) {
            this.computeTime = 0
            clearInterval(this.intervalId)
          }
        }
      }
    },
    showAlert (alertText) {
      this.alertShow = true
      this.alertText = alertText
    },
    // 异步登录
    async login () {
      let result
      // 前台表单验证
      if (this.loginWay) { // 短信登录
        const { rightPhone, phone, code } = this
        if (!this.rightPhone) {
          // 手机号不正确
          this.showAlert('手机号不正确')
          return
        } else if (!/^\d{6}$/.test(code)) {
          // 验证码必须是6位数字
          this.showAlert('验证码必须是6位数字')
          return
        }
        // 发送ajax 短信登录
        result = await reqSmsLogin({ phone, code })
      } else { // 密码登录
        const { name, pwd, captcha } = this
        if (!this.name) {
          this.showAlert('用户名必须指定')
          return
        } else if (!this.pwd) {
          // 密码必须指定
          this.showAlert('密码必须指定')
          return
        } else if (!this.captcha) {
          // 验证码必须指定
          this.showAlert('验证码必须指定')
          return
        }
        // 密码登录
        result = await reqPwdLogin({ name, pwd, captcha })
      }
      // 停止倒计时
      if (this.computeTime) {
        this.computeTime = 0
        clearInterval(this.intervalId)
      }
      if (result.code === 0) {
        const user = result.data
        // 将user保存到state
        this.$store.dispatch('recordUser', user)
        // 跳转路由
        this.$router.replace('/profile')
      } else {
        // 显示新的图片验证码
        this.getCaptcha()
        const msg = result.msg
        this.showAlert(msg)
      }
    },
    // 关闭警告框
    closeTip () {
      this.alertShow = false
      this.alertText = ''
    },
    // 获取一个新的图片验证码
    getCaptcha () {
      // 每次指定的src要不一样
      this.$refs.captcha.src = 'http://localhost:4000/captcha?time=' + Date.now()
    }
  },
  components: {
    AlertTip
  }
}
</script>
<style lang="stylus" scoped>
  .loginContainer
      width 100%
      height 100%
      background #fff
      .loginInner
        padding-top 60px
        width 80%
        margin 0 auto
        .login_header
          .login_logo
            font-size 40px
            font-weight bold
            color #02a774
            text-align center
          .login_header_title
            padding-top 40px
            text-align center
            >a
              color #333
              font-size 14px
              padding-bottom 4px
              &:first-child
                margin-right 40px
              &.on
                color #02a774
                font-weight 700
                border-bottom 2px solid #02a774
        .login_content
          >form
            >div
              display none
              &.on
                display block
              input
                width 100%
                height 100%
                padding-left 10px
                box-sizing border-box
                border 1px solid #ddd
                border-radius 4px
                outline 0
                font 400 14px Arial
                &:focus
                  border 1px solid #02a774
              .login_message
                position relative
                margin-top 16px
                height 48px
                font-size 14px
                background #fff
                .get_verification
                  position absolute
                  top 50%
                  right 10px
                  transform translateY(-50%)
                  border 0
                  color #ccc
                  font-size 14px
                  background transparent
                  &.right_phone
                    color  black
              .login_verification
                position relative
                margin-top 16px
                height 48px
                font-size 14px
                background #fff
                .switch_button
                  font-size 12px
                  border 1px solid #ddd
                  border-radius 8px
                  transition background-color .3s,border-color .3s
                  padding 0 6px
                  width 30px
                  height 16px
                  line-height 16px
                  color #fff
                  position absolute
                  top 50%
                  right 10px
                  transform translateY(-50%)
                  &.off
                    background #fff
                    .switch_text
                      float right
                      color #ddd
                  &.on
                    background #02a774
                  >.switch_circle
                    //transform translateX(27px)
                    position absolute
                    top -1px
                    left -1px
                    width 16px
                    height 16px
                    border 1px solid #ddd
                    border-radius 50%
                    background #fff
                    box-shadow 0 2px 4px 0 rgba(0,0,0,.1)
                    transition transform .3s
                    &.right
                      transform translateX(30px)
              .login_hint
                margin-top 12px
                color #999
                font-size 14px
                line-height 20px
                >a
                  color #02a774
            .login_submit
              display block
              width 100%
              height 42px
              margin-top 30px
              border-radius 4px
              background #4cd96f
              color #fff
              text-align center
              font-size 16px
              line-height 42px
              border 0
          .about_us
            display block
            font-size 12px
            margin-top 20px
            text-align center
            color #999
        .go_back
          position absolute
          top 5px
          left 5px
          width 30px
          height 30px
          >.iconfont
            font-size 20px
            color #999
</style>
